CarTech Micro-Melt CCM®-MC Powder for Additive Manufacturing

ASTM F3213, ASTM F1537, ASTM F75, ISO 5832-4, ISO 5832-12, UNS R31537, and CTCAM-1003

NOMINAL CHEMISTRY

Carbon (Max) 0.10% Manganese (Max) 1.00%Phosporous (Max) 0.02% Sulfur (Max) 0.01%Silicon (Max) 1.00% Chromium 27.00 to 30.00%Nickel (Max) 0.50% Molybdenum 5.00 to 7.00%

Titanium (Max) 0.10% Cobalt (Max) Balance

Aluminum (Max) 0.10% Boron (Max) 0.01%Tungsten (Max) 0.20% Nitrogen (Max) 0.25%Oxygen (Max) 0.04% Iron (Max) 0.75%

CarTech Micro-Melt CCM-MC alloy powder is a non-magnetic, cobalt-chromium-molybdenum alloy exhibiting high strength, corrosion resistance, and wear resistance. This alloy is a powder metallurgy version similar to CarTech Micro-Melt CCM® and CCM Plus® alloys, and is a high nitrogen, middle carbon version of ASTM F75 cast alloy. CarTech Micro-Melt CCM-MC alloy powder is produced by vacuum induction melting (VIM) followed by nitrogen gas atomization.

CarTech Micro-Melt CCM-MC alloy powder has excellent weldability in laser and electron-beam additive manufacturing processes.

DESCRIPTION

KEY PROPERTIES & APPLICATIONS

SPECIFICATIONS

✓ Exhibits high strength up to 932-1112°F (500-600°C)✓ Wear and erosion resistant✓ Maintains mechanical properties under variety of corrosive environments✓ Biocompatible (when specified nickel content below 0.1%)✓ Non-magnetic: allows use in Magnetic Resonance Imaging (MRI) equipment✓ Suited for small biomedical devices where high strength and fatigue resistance are required

• Orthopedic and dental implants• Medical fracture fixation devices• Gas turbine nozzles and instrumentation devices• Oil & gas tooling and instrumentation

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POWDER PROPERTIES

Nominal Particle Size Range 10-45 μm 15-45 μm 15-53 μm 45-109 μmApplication L-PBF (1) L-PBF (1) L-PBF (1) EB-PBF, DED (1)

Max. Particle Size Max 5% >45 μm (2) Max 5% >45 μm (2) Max 5% >53 μm (2) Max 5% >109 μm (2)

Min. Particle Size Max 5% <10 μm (3) Max 5% <15 μm (3) Max 5% <15 μm (2) Max 5% <45 μm (2)

Atomization Vacuum atomization with Nitrogen gasApparent Density (g/cm3) 4.4 – 4.6 typ. Measured according to ASTM B212 (4) and reported Reported (ASTM B212 (4))Tap Density (g/cm3) 4.9 – 5.1 typ. Measured according to ASTM B527 (5) and reported Reported (ASTM B527 (5)

(1) ASTM/ISO 52900: Laser - Powder Bed Fusion (L-PBF), Electron-Beam Powder Bed Fusion (EB-PBF), Direct Energy Deposition (DED)(2) ASTM B214 Standard Test Method for Sieve Analysis for Metal Powders(3) ASTM B822 Standard Test Method for Particle Size Distribution of Metal Powders and Related Compounds by Light Scattering/IEC 17025 Chemical, per relevant ASTM procedures.(4) ASTM B212 Standard Test Method for Apparent Density of Free-Flowing Metal Powders Using the Hall Flowmeter Funnel(5) ASTM B527 Standard Test Method for Tap Density of Metal Powders and CompoundsTesting of powder will fulfill certification requirements to Nadcap Materials Testing and ISO/IEC 17025 Chemical, per relevant ASTM procedures.

CORROSION RESISTANCE

Nitric Acid Excellent Sulfuric Acid GoodPhospohoric Acid Good Acetic Acid ExcellentSodium Hydroxide Moderate Salt Spray (NaCl) ExcellentSea Water Good Sour Oil/Gas -

Humidity Excellent

Important Note: The corrosion resistance rating scale is intended for comparative purposes only. Corrosion testing is recommended; factors which affect corrosion resistance include: temperature, concentration, pH, impurities, aeration, velocity, crevices, deposits, metallurgical condition, stress, surface finish, and dissimilar metal contact.

100 µm

ADDITIVE MANUFACTURING PROCESS GUIDANCE

Laser Powder Bed Fusion (L-PBF)

Micro-Melt CCM-MC is compatible with all commercially available L-PBF equipment.To achieve mean, as-built density > 99.9% 20 to 60 µm layer thickness and Specific Energy ≥ 55 J/mm3 should be used.

Solution Heat Treatment (“Solution”)

Standard solution treatment schedule to obtain combination of tensile properties and stress rupture properties.

For example Heat Treatment: Solution at 2174°F (1190°C) for 1 hr. followed by cooling at > 66°F/min (37°C/min) to 1200°F (649°C). Cool equivalent to air to RT.

Schedules tailored better to the thermal history of the AM process may be available. Please contact Carpenter Technology for information.

Hot Isostatic Pressing followed by Solution Heat Treatment(“HIP/Solution”)

HIP as standard practice is recommended for microstructure homogenization, removal of voids due to splatter, entrapped gas, and keyhole porosity, as well as shrinkage-induced micro-cracks in the material.

To achieve up to full density (100%):

Process components under inert atmosphere at not less than 14.5 ksi (100 MPa) within the range of 2192°F to 2210°F (1200°C to 1210°C); hold at the selected temperature within ±25°F (±14°C) for 240 min. ± 60 min. then cool under inert atmosphere to below 800°F (427°C). Follow with solution heat treatment as described above.

MachinabilityMicro-Melt CCM-MC for additive manufacturing is difficult to machine in any heat treat condition due to its extremely high work hardening rate, low thermal conductivity, and abrasive carbides in the microstructure. Tool geometry, rigidity, and adequate machine power are all extremely important considerations.

TYPICAL ACHIEVABLE MECHANICAL PROPERTIES

Mechanical DataUnits As-built Solution HIP/Solution ASTM Spec. (1)

X and Y Z X and Y Z X and Y Z X and Y Z

Tensile Strengthksi 198 185 157 156 160 160 95 95

MPa 1383 1276 1083 1076 1117 1117 655 655

0.2% Offset Stressksi 153 119 92 91 94 93 65 65

MPa 1055 821 634 627 648 641 450 450Elongation in 4D % 8 17 14 15 16 20 8 8Reduction Area % 9 16 12 14 14 18 8 8

Impact Energyft-lbs 13 16 11 9 10 11 n.a. n.a.

J 18 22 15 12 14 15 n.a. n.a.

Hardness HRC 38 38 32 32 31 31 n.a. n.a. (1) ASTM F3213-17 Standard for Additive Manufacturing - Finished Part Properties - Standard Specification for Cobalt-28 Chromium-6 Molybdenum via Powder Bed Fusion

TYPICAL MICROSTRUCTURES

Condition Transverse (in X-Y plane) Longitudinal (Z-plane) Notes

As-built Mean densities 99.96 to 99.98% as built

HIP/Solution Up to 100% density

As-Built Clean weld tracks visibleMinimal splatter porosity

Solution only

Isotropic microstructure Equiaxed Grains

Some Twinning PresentAverage grain size - 5.5 (1)

HIP/Solution

Isotropic microstructureEquiaxed Grains

Some Twinning PresentAverage grain size - 5 (1)

(1) ASTM E112 standard Test Method for Determining Average Grain Size.

Disclaimer: The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his/her own evaluation and are not intended as warranties, either express or implied, of fitness for these or other purposes. There is no representation that the recipient of this literature will receive updated editions as they become available.

Unless otherwise specified, registered trademarks are property of CRS Holdings Inc., a subsidiary of Carpenter Technology Corporation. Copyright 2018 CRS Holdings Inc. All rights reserved. 5/18 D001

CONTACT US

Carpenter Technology Corporation1735 Market Street

Philadelphia, PA 19103

Global Powder Sales/Customer Service: Toll Free: 833-584-1052

International: +1-610-208-4000 powdersales@cartech.com